Does regular real-time differ from Island ECN

This is newbies question. I saw following news:
AVI Biopharma (AVII) stock soared Friday after a report that it had developed a therapy that killed the SARS coronavirus. On Island ECN, however, it gave back $1.30 of its $1.91 regular-session advance.

Does that mean one can see $5.75 as close price on 4/25 using Island ECN, rather than $7.05 on regular real-time chart, such as eSignal.